Does anyone have figures for the height from flywheel surface to top of the clutch cover for a 6-bolt, 11 inch diapharam clutch and the same measurments for a 9-bolt, 10-3/4 in. clutch cover. I'm trying to discover if I can drill a 9-bolt flywheel to take a 6-bolt clutch. I'm concerned the 6-bolt might not fit in the early bell housing as Chevrolet changed bell housings at the same time they changed clutches and flywheels.
1951 3800 1-ton "Earning its keep from the get-go" In the DITY Gallery 1962 261 (w/cam, Fenton headers, 2 carbs, MSD ign.), SM420 & Brown-Lipe 6231A 3spd aux. trans, stock axles & brakes. Owned since 1971.
Chevrolet used the same throwout bearing from 1938 to 1962 on 216’s and 235’s and more. The same bearing was used on all clutch sizes. I don’t have pressure plate samples anymore, but I am sure you will find that the finger height will be the same on all. This picture is from a 1961 parts book, but the bearing was used for more years than this.
The 9 bolt pressure plate uses a longer throw out bearing like ct22 or ct25. The earliest 6 bolt pressure plates with the flat fingers used the same but if you buy the more modern tall fingered 6 bolt pressure plate it takes the standard short throw out bearing. They all will fit in the bell housing. Thanks
